macOS arm64 (#591)

.gitmodules

@@ -38,3 +38,7 @@
 	path = third-party/ffmpeg-linux-aarch64
 	url = https://github.com/LizardByte/build-deps
 	branch = ffmpeg-linux-aarch64
+[submodule "ffmpeg-macos-aarch64"]
+	path = third-party/ffmpeg-macos-aarch64
+	url = https://github.com/LizardByte/build-deps
+	branch = ffmpeg-macos-aarch64

CMakeLists.txt

@@ -375,7 +375,11 @@ if(WIN32)
 	set(FFMPEG_PREPARED_BINARIES "${CMAKE_CURRENT_SOURCE_DIR}/third-party/ffmpeg-windows-x86_64")
 	set(FFMPEG_PLATFORM_LIBRARIES mfplat ole32 strmiids mfuuid)
 elseif(APPLE)
+	if (CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64")
+		set(FFMPEG_PREPARED_BINARIES "${CMAKE_CURRENT_SOURCE_DIR}/third-party/ffmpeg-macos-aarch64")
+	else()
 		set(FFMPEG_PREPARED_BINARIES "${CMAKE_CURRENT_SOURCE_DIR}/third-party/ffmpeg-macos-x86_64")
+	endif()
 else()
 	if (CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
 		set(FFMPEG_PREPARED_BINARIES "${CMAKE_CURRENT_SOURCE_DIR}/third-party/ffmpeg-linux-aarch64")

docs/source/building/macos.rst

@@ -12,7 +12,7 @@ MacPorts
 Install Requirements
    .. code-block:: bash
 
-      sudo port install boost cmake libopus npm9
+      sudo port install avahi boost180 cmake curl libopus npm9 pkgconfig
 
 Homebrew
 """"""""

packaging/macos/Portfile

@@ -32,6 +32,7 @@ post-fetch {
 }
 
 depends_lib              port:avahi \
+                         port:boost180 \
                          port:curl \
                          port:libopus \
                          port:npm9 \